What do film emotional-arc studies (Del Vecchio et al.; Chu and Roy) measure and report, with what data, methods and stated limits, so an agent can say what a computational "story arc" does and does not show?

Del Vecchio et al.'s preprint (arXiv 1807.02221v2, July 2018) clusters lexicon sentiment arcs of 6,174 English subtitle files from opensubtitles.org (its abstract calls them 'movie scripts') into six shapes and reports Man in a Hole as the highest mean domestic gross ($37.48 million), which the authors attribute to being 'talked about' rather than 'liked'; cluster-count robustness is not in the paper. Chu and Roy (arXiv 1712.02896v1) found combined audio-visual arcs on 509 films formed largely indistinct clusters. Curator qualifications: Refereed JORS 2020 version (DOI 10.1080/01605682.2019.1705194) not read; results may differ from the preprint (AUDIT1 row 12). Cite as preprint. 'Movie scripts' wording is the authors'; the data are subtitle files (dialogue only). Revenue association is correlational; not evidence about scene-level writing choices (producer synthesis agrees). Subtitle files are third-party user uploads; no dataset reuse rights implied. Text only; no sentiment analysis reproduced. Limitations: English subtitles, revenue proxy; one lexicon (syuzhet). Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

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      "url": "https://arxiv.org/pdf/1807.02221",
      "note": "arXiv abs 1807.02221v2 header; v2 PDF (pdftotext) lines 16-25, 136-137, 168-182, 353, 373; arXiv 1712.02896v1 (pdftotext) lines 130-138, 452, 623, 785"
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      "url": "https://arxiv.org/pdf/1807.02221",
      "note": "cited at https://arxiv.org/abs/1807.02221; arXiv abs 1807.02221v2 header; v2 PDF (pdftotext) lines 16-25, 136-137, 168-182, 353, 373; arXiv 1712.02896v1 (pdftotext) lines 130-138, 452, 623, 785"
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      "note": "arXiv abs 1807.02221v2 header; v2 PDF (pdftotext) lines 16-25, 136-137, 168-182, 353, 373; arXiv 1712.02896v1 (pdftotext) lines 130-138, 452, 623, 785"
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